And a new police building in Weymouth that can house 40 officers is being staffed by just four people.

The annual 'mortgage' payments will rise with inflation year on year and the Dorset force is locked into the deals for the next 26 years. After that the taxpayer will then own the buildings.

Earlier this year it emerged that Dyfed-Powys police in Wales was paying 700,000 a year for a police station that has had to be closed to the public due to budget cutbacks.

The force is tied into the deal for 30 years and could end up costing the force 21.7 million pounds.

And Hampshire police has wasted 11.4 million pounds in buying and maintaining a new headquarters that has sat empty for five years and will never be used.

Martyn Underhill, the Police Crime Commissioner for Dorset, said he was shocked when he discovered the waste of public money relating to his force.

Mr Underhill is lobbying the government to intervene and renegotiate the PFI deals to save the taxpayer wasting millions of more pounds in years to come.

He said: "This is happening with every police force in the country. Hundreds of millions of pounds are being spent.

"These deals were arranged during the boom years when police forces had money and before the bust of 2008 came along.

"The government pushed these PFI schemes and encouraged public sector agencies to use it.

"I have tried myself to renegotiate the contract but it is absolutely water tight."

Clive Chamberlain, the chairman of the Dorset Police Federation which represents the rank and file officers, said: "We are getting rid of 500 police officers because we can't afford to keep them but at the same time are paying millions of pounds in keeping two buildings that aren't being used.

"It needs urgent government intervention. I can't understand how they can justify paying millions of pounds for the next 30 years when the main issue is that we need staff."